Pumping mechanism



June 10,1941.

B. BRAssl-:LL 2,245,457

PUMPING MECHANI SM Filed Jun@y 29. 1940 s sheets-sheet 1 /7 7! gri/umwelt' B1-yan rasse June 1o,`1941. B, BRASSELL 2,245,457

PUMPING MECHANISM Filed June 29, 1940 3 Sheets-Sheet 2 June 10, 1941. E, BRASSELL 2,245,457

` PUMPING' MECHANISM Filed June 29, 1940 3 Sheets-Sheet I5 /75' r 5629 v Sima il :1i

APatented .lune 10, 1941 UNHTED STATES PATENT QFFICE 9 Claims.

This invention relates to certain new and useful improvements in pumping mechanism.

'I'he primary object of the invention is to provi-de pumping mechanism wherein rotary motion is converted into rectilinear motion for the operation of a pump rod, it being understood that the apparatus disclosed herein is as well adaptable for log sawing and will find use in many arts.

A further object of the invention is to provide pumping mechanism of the foregoing character wherein a rotary shaft is equipped with a raised track of reversed crossing double screw formation with devices carried by a reciprocating frame coacting with crossed trackage combined with means rendered operable in proximity of the limit of reciprocating movements of said frame for assisting the frame in the start of its reversed reciprocatory movement.

With the above and other objects in view that will become apparent as the nature of the invention is better understood, the same consists in general of certain novel details of construction and combination of parts hereinafter more fully described, illustrated in the accompanying drawings and claimed.

In the accompanying drawings:

Figure 1 is a fragmentary side elevational view of pumping mechanism constructed in accordance with the present invention, showing a motor driven shaft provided with raised trackage of double reverse thread or groove construction with a reciprocating frame associated with said shaft,

Figure 2 is a fragmentary front elevational view of the mechanism,

Figure 2 is a fragmentary front elevational sectional view of the upper end of the mechanism showing the reversing cam blocks moved to position for engagement by cams on the shaft of the mechanism,

Figure 4 is a vertical longitudinal sectional View taken on line 4--4 of Figure 3,

Figure 5 is a fragmentary side elevational View with the reversing cam blocks in the same position as shown in Figure 3,

Figure 6 is a fragmentary longitudinal sectional view taken on line B--G of Figure 1, showing resilient mounting for the cams on the lower end of the shaft for the operation of the cani, blocks,

Figure '7 is a horizontal sectional View taken on line I-l of Figure 3, showing the cams at the upper end of the shaft engaged with the cam blocks,

Figure 8 is a horizontal sectional view taken on line 8 8 of Figure 1, showing the normal position of the cam blocks and the blades carried thereby cooperating with the grooved trackage of the shaft for effecting reciprocatory movement of the cam blocks and frame carried thereby during rotation of the shaft.

Figure 9 is an inner face of one of the cam blocksl and Figure 10 is a detail sectional view taken on line Ill-I0 of Figure 8.

The mechanism comprises a stationary frame structure of generally rectangular formation in plan View havingcorner frame b-ars I5 connected at their upper ends to a head plate I6, while the lower ends are connected to a base plate I1. A shaft I3 is journaled at its upper and lower ends respectively as at I9 and 20 in the head and base plates, the lower bearing 20 including an end thrust mounting ZI as shown in Figure 6. The shaft I8 is journaled in the bearings I9 and 20, the upper end of the shaft projecting above the head plate I6 and carrying a bevel gear 22 upon its upper end that is engaged with a bevel gear 23 on the shaft of the motor 24, the latter being supported upon a bracket plate 25 projecting laterally of the head plate IB and in the plane thereof.

The shaft I8 being rotated by the motor 24 is cooperatively constructed with other elements to convert such rotary motion into rectangular movement of a driven member, the shaft being provided with raised trackage 26 of a character to provide reverse thread track grooves 2l that extend over the major length of the shaft I8 and terminate in proximity of a pair of collars 28 respectively arranged adjacent opposite ends of the shaft I8 and in spaced relation to the head and 'base plates I6 and I1.

A sliding frame structure is associated with the stationary frame structure and is of general U-shape comprising side bars 29 connected at the lower ends by a cross bar 3i! from which cross bar a pump rod or similar element 3l depends, the sliding frame having the side bars 29 thereof disposed in inclosing relation with respect to the stationary frame with the side bars 29 respectively disposed between adjacent corner frame bars I5 of the stationary frame. The sliding frame bars 29 are guided in their movements by means of a pair of guide blocks 32 secured to the frame bars I5 adjacent the lower ends thereof as shown in Figures 1 and 2.

A pair of reversing cam blocks 33 and 34 is carried by the upper ends of the side bars 29 of the sliding frame, being diametrically arranged with respect tothe stationary frame and being movable between the corner frame bars I5 at the sides of the stationary frame opposite the sides occupied by the side bars 29 of the sliding frame. The connection between the cam blocks and the upper ends of the side bars 29 comprises a substantially horziontal arm 35 of plate formation connected to each side of the cam blocks 33 intermediate the upper and lower edges thereof, the arm 35 extending toward the oppositely positioned cam block 34 and being pivotally mounted intermediate the ends thereof on the pivot pin 35 carried by the upper end of the adjacent side bar 29, the arm 35 being positioned at the inner sides of the adjacent side bars I5 of the stafionary frame. The arm 35 at its pivotal mounting is provided with a forked head as clearly shown in Figures 1 and 5 and is bent to provide offset legs 31 carrying abutment feet 38 and 39 respectively overlying the outer side of the opposite side bar I5 of the stationary frame. A platelike arm 4I) is secured to each vertical side edge of the reversing cam block 34 between the upper and lower edges thereof and being directed tward the cam block 33 is pivotally mounted intermediate its ends upon the pivot pin 36, the arm 45 being disposed inwardly of the adjacent bars I5 and being offset as at 4I to be disposed at the outer side of the side bar 29 of the sliding frame, the free end of the arm 4I! carrying a cross head 42 with abutment feet 43 and 44 repectively carried by the upper and lower ends of the cross head 42. When the cam blocks 33 and 34 are positioned intermediate the ends of the corner frame bars l5, rollers 45 carried by the opposite vertical side edges of the reversing cam bars ride upon the corner frame bars I5.

The supporting connection between the upper end of the sliding frame and the shaft I8 includes a blade carried by each reversing cam block and engaged in the grooves of the double reversed screw-like raised trackage on the shaft I3, said connection including, as shown more clearly in Figures 3, 8 and 10, a stub shaft 46 rotatable and slidable in a bearing 41 centrally of the cam block. The inner end of the stub shaft 45 has a blade 4S fixed thereto that extends into the track groove 21 in the shaft I8, the outer end of the stub shaft 46 having a screw 49 adjustably threaded therein and freely passing lthrough a bowed leaf spring 50 that has its ends anchored as at 5I. A nut threaded on the screw 49 between the spring 59 and stub shaft 45 varies the tension of the spring upon the stub shaft and the track blade 43. Each reversing cam block carries at the upper and lower sides thereof and on the inner face cam shoulders 52 and 53 respectively for purposes presently to appear.

In the operation of the pumping mechanism, the shaft I3 is continuously rotated in one direction and the blades 48 carried by the cam blocks 33 and 34 ride in the track grooves 31 with the rollers 45 riding on the outer edges of the frame corner bars I5. Assuming that the sliding carriage with the cam bars is moving in an upward direction, the upwardly disposed abutment feet 38 and 43 carried by the arms 35 and 40 move into engagement with the tensioned abutment pins 54 carried by the corner bars I5 of the stationary frame and this engagement is operative for moving the arms 35 and 49 on the pivot pin mounting 35, the outer faces of the side bars I5 being provided with recessed portions into which the upwardly positioned cam block rollers 45 are movable, resulting in tilting or pivotal movements of the cam blocks 33 and 34 to position the upper cam surfaces 52 and 53 in position as shown in Figure 3 to be engaged by cam arms 55 diametrically projecting from opposite sides of the shaft I8 above the collar 28, this engagement of the cam blocks with the cam arms tending to slightly force the cam blocks in a downward direction and start the sliding frame in its downward direction of movement. When the cam blocks 33 and 34 carried by the upper end of the sliding frame approach the lower end of the shaft I8 and the lower end of the stationary frame, the lower abutment feet 39 and 49 engage the tensioned abutment pins 51 adjacent the lower end of the stationary frame for pivotally moving the arms 35 and 40 and swinging the cam blocks 33 and 34 to cause the lower rollers 45 upon the cam blocks to enter the recessed portions 58 in the stationary frame bars I5 resulting in the swinging inwardly of the lower ends of the cam blocks and positioning the lower cam faces 53 thereon in position to be engaged by a pair of diametrically opposite cam arms 59 carried by a collar GEI surrounding the lower end of the shaft I8, being resiliently supported by the spring 5i and restrained from rotation by means of the cross pin 62 carried by the collar and extending through a transverse opening 53 in the shaft I8, the resilient support for the lower cam arms 59 absorb end thrust, the cam arms 59 by their engagement with the lower cam shoulders 53 acting to assist the sliding frame at its start of upward movement relative to the shaft I8 and stationary frame.

From the above detailed description of the invention, it is believed that the construction and operation thereof will at once be apparent, and while there is herein shown and described the preferred embodiment thereof, it is to be understood that minor changes may be made in the details of construction, such as will fall within the scope of the invention as claimed.

I claim:

l. In apparatus of the class described, a stationary frame, a slidable frame associated therewith, a Working element carried by the slidable frame and cooperating means carried by the two frames to effect movements of the slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves, and diametrically opposite track blades carried b-y the slidable frame working in said track grooves, and adjustable spring means for tensioning said track blades.

2. In apparatus of the class described, a stationary frame, a slidable frame associated therewith, a working element carried by the slidable frame and cooperating means carried by the two frames to effect movements of the slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves and diametrically opposite track blades carried by the slidable frame working in said track grooves, diametrically opposite cam blocks pivotally mounted on the slidable frame and upon which the track blades are mounted, the cam blocks being normally restrained from pivotal movements b-y engagement with the stationary frame, said stationary frame being constructed to permit pivotal movements of the cam block at points adjacent the limits of movements of the sliding frame, cooperating abutment feet and pins carried by the slidable frame and stationary frame for effecting pivotal movements of the cam blocks, and cam arms carried b-y opposite ends of the shaft for engagement with the adjacent end of the cam blocks for effecting the initial reverse directional sliding movements of the slidable frame.

3. In apparatus of the class described, a stationary frame, a slidable frame associated therewith, a working element carried by the slidable fram-e and cooperating means carried by the two frames to effect movements of the slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves, diametrically opposite track blades carried by the slidable frame working in said track grooves, adjustable spring means for tensioning said track blades, diametrically opposite cam blocks pivotally mounted on the slidable frame and upon which the track blades are mounted, the cam blocks being normally restrained from pivotal movements by engagement with the stationary frame, said stationary frame being constructed to permit pivotal movements of the cam blocks at points adjacent the limits of movements of the sliding frame, cooperating abutment feet and pins carried by the slidable frame and stationary frame for effecting pivotal movements of the cam blocks, and cam arms carried by opposite ends of the shaft for engagement with the adjacent ends of the cam blocks for effecting the initial reverse directional sliding movements of the slidable frame.

4. In apparatus of the class described, a stationary frame, a slidable frame associated therewith, a working element carried by the slidable frame and cooperating means carried by the two frames to eiect movements of. the slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves and diametrically opposite track blades carried by the slidable frame Working in said track grooves, diametrically opposite cam blocks pivotally mounted on the slidable frame and upon which the track blades are mounted, the cam bl-ocks being normally restrained from pivotal movements by engagement with the stationary frame, said stationary frame being constructed to permit pivotal movements of the cam block at points adjacent the limits of movements of the sliding frame, cooperating abutment feet and pins carried by the slidable frame and stationary frame for effecting pivotal movements of the cam blocks, and cam arms carried by opposite ends of the shaft for engagement with the adjacent end of the cam blocks for effecting the initial reverse directional sliding movements of the slidable frame, arms carrying the abutment feet, said arms being arranged in crossed relation and pivoted at their crossing points to the slidable frame and the cam blocks being respectively secured to the outer ends of the arms.

5. In apparatus of the class described, a stationary frame, a slidable frame associated therewith, a working element carried by the slidable frame and cooperating means carried by the two frames to effect movements of the slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves and diametrically opposite track blades carried by the slidable frame Working in said track grooves,

adjustable spring means for tensioning said track blades, diametrically opposite cam, blocks pivotally mounted on the slidable frame and upon which the track blades are mounted, the cam blocks being normally restrained from pivotal movements by engagement with the stationary frame, said stationary frame being constructed to permit pivotal movements of the cam blocks at points adjacent the limits of movements of the sliding frame, cooperating abutment feet and pins carried by the slidable frame and stationary frame for effecting pivotal movements of the cam blocks, and cam arms carried by opposite ends of the shaft for engagement with the adjacent ends of the cam blocks for eecting the initial reverse directional sliding movements of the slidable frame, arms carrying the abutment feet, said arms being arranged in crossed relation and pivoted at their crossing points to the slidable frame and the cam blocks being respectively secured to the outer ends of the arms.

6. In apparatus of the class described, a stationary frame, a slidable frame associated therewith, a working element carried by the slidable frame Aand cooperating means carried by the two frames to effect movements of the slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves and diametrically opposite track blades carried by the slidable frame working in said track grooves, diametrically opposite cam blocks pivotally mounted on the slidable frame and upon which the track blades are mounted, the cam blocks being normally restrained from pivotal movements by engagement with the stationary frame, said stationary frame being constructed to permit pivotal movements of the cam block at points adjacent the limits of movements of the sliding frame, cooperating abutment feet and pins carried by the slidable frame and stationary frame for effecting pivotal movements of the cam blocks, and cam arms carried by opposite ends of the shaft for engagement with the adjacent end of the cam Kblocks for effecting the initial reverse directional sliding movementsof the slidable frame, the cam arms at one end of the shaft being rigidly secured thereto and the cam arms at the other end of the shaft being resiliently mounted to absorb end thrust.

7. In apparatus of the class described, a stationary frame, a slidable frame associated therewith, a working element carried by the slidable frame and cooperating means carried by the two frames to eiect movements of the slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves and diametrically opposite track blades carried by the slidable frame working in said track grooves, adjustable spring means for tensioning said track blades, diametrically opposite cam blocks pivotally mounted on the slidable frame and upon which the track blades are mounted, the cam blocks being normally restrained from pivotal movements by engagement with the stationary frame, said stationary frame being constructed to permit pivotal movements of the cam blocks at points adjacent the limits of movements of the sliding frame, cooperating abutment feet and pins carried by the slidable frame and stationary frame for effecting pivotal movements of the cam blocks, and cam arms carried by opposite ends of the shaft for engagement with the adjacent ends of the cam blocks for ef- `feoting the initial reverse directional sliding movements of the slidable frame, the cam arms at one end of the shaft being rigidly secured thereto and the cam arms at the other end of the shaft being resiliently mounted to absorb end thrust.

8. In apparatus of the class described, a stationary frame, a slidable frame associated therewith, a Working element carried by the slidable frame and cooperating means carried by the two frames to effect movements of the Y.slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves and diametrically opposite track blades carried by the slidable frame working in said track grooves, diametrically opposite cam blocks pivotally mounted on the slidable frame and upon which the track blades are mounted, the cam blocks being normally restrained from pivotal movements by engagement with the stationary frame, said stationary frame being constructed to permit pivotal movements of the cam. block at points adjacent the limits of movements of the sliding frame, cooperating abutment feet and pins carried by the slidable frame and stationary frame for effecting pivotal movements of the cam blocks and cam arms carried by opposite ends of the shaft for engagement with the adjacent end of the cam blocks for effecting the initial reverse directional sliding movements of the slidable frame, arms carrying the abutment feet, said arms being arranged in crossed relation and pivoted at their crossing points to the slidable frame and the cam blocks being respectively secured tothe outer ends of the arms, the cam arms at one end of the shaft being rigidly secured thereto and the cam arms at the other end of the shaft being resiliently mounted to absorb end thrust.

9. In apparatus of the class described, a stati-onary frame, a slidable frame associated therewith, a working element carried by the slidable frame and cooperating means carried by the two frames to effect movements of the slidable frame relative to the stationary frame, including a shaft journaled longitudinally of the stationary frame having reverse double screw track grooves and diametrically opposite track blades carried by the slidable frame working in said track grooves, adjustable spring means forl tensioning said track blades, diametrically opposite cam blocks pivotally mounted on the slidable frame and upon which the track blades are mounted, the cam blocks being normally restrained from pivotal movements by engagement with the stationary frame, said stationary frame being constructed to permit pivotal movements of the cam blocks at points adjacent the limits of movements of the sliding frame, cooperating abutment feet and pins carried by the slidable frame and stationary frame for effecting pivotal movements of the cam blocks, and cam arms carried by opposite ends of the shaft for engagement with the adjacent ends of the cam, blocks for effecting the initial reverse directional sliding movements of the slidable frame, arms carrying the abutment feet, said arms being arranged in crossed relation and pivoted at their crossing points to the slidable frame and the camy blocks being respectively secured to the outer ends of the arms, the cam arms at one end of the shaft being rigidly secured thereto and the cam arms at the other end of the shaft being resiliently mounted to absorb end thrust.

BRYAN BRASSELL. 

